My original application is a 10 KHZ sampling frequency, cutoff frequency of 60 hz, 32 order hamming window, enter the superposition of three wave frequency, respectively, as shown in figure, now I'd like to change to the sampling frequency is 15 KHZ, cut-off frequency, 5000 is still 32 order hamming window, enter the three stacked waveform for amplitude of 1300 0 hz, 6000 hz and 7000 hz, the DSP board is 28335